Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2e2f3a722fd461…

MALICIOUS

PDF

434.2 KB Created: 2007-02-25 14:30:32 +08:00
MD5: 056ac8e6903584fab6b3b27d8aec563a SHA-1: 483fc785510e6db9131a58722be643d5aa73c977 SHA-256: 1a2e2f3a722fd4614f60ba35696e5042bbbef72415fd5dca10cf56d5af11bbcb
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a dropper. Heuristics indicate the presence of embedded JavaScript, which is a common technique for delivering second-stage malware. The embedded JavaScript stream is likely responsible for downloading and executing a malicious payload, as suggested by the ClamAV detection name 'Pdf.Dropper.Agent-1828654'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-1828654 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1828654
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0093_001.js
8df11eccbc954c790e98b5396f3c952c332493d91e05adac99ab12907f1401e8		 pdf-javascript-stream PDF /JS object 93 at offset 0x6BAC8 7634 bytes

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